Bread-wrapping machine



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BREAD WRAPPING MACHINEA Filed Ilb. 2l, 1925 17 ShetS-Sheeb 17 lmmnov Ghana Omen roume Patented 6, 1929.`

UNITED. STATES PATENT oEFIcE.

CHARLES OWEN BRWNELL, 0F EATON RAPIDS, MICHIGAN, ASSIGNOR, BY MESNE ASSIGNMENTS, T0 TI-IE WRAP-RITE PORATION OF ILLINOIS.

l CORPORATION, OF CHICAGO, ILLINOIS, A. COR- BREAD-WRAIPPING MACHINE.

Application filed February 21, 1925. Serial No. 10,826.

This invention relates to a bread wrapping machine. It is customary to enclose loaves of bread in wrappers for the purpose of keeping the same clean and sanitary and also to guard against evaporation whereby the bread becomes dry and stale. The loaves of bread are individually wrapped in paper,

`and it is an object and purpose of my invention to provide a machine wherein loaves of bread may be wrapped one after another very quickly and expeditiously so that the machine is capable of taking care of a very large quantity in a relatively short time.

rlhe machine which I have produced is dc-y signed to wrap the bread in waxed paper, the paper' being of a well-known character impregnated with 'paraiiin or similar constituent. It is a further object and purpose of the invention to provide a machine Whercin the paper is very snugly wrapped around each loaf of bread, being maintained in tight and snug condition at all times during the process of wrapping and after the wrapping is complete. A still further object of my iny vention is to seal the' wrappers on the loaves of bread by heating the waxed paper so as to cause fusing of the wax in the paper where portions of the-paper come together; particularly at the end s of the paper wrapper, cool the same, and finally eject the completely wrapped and sealed loaf of bread from the machine without the necessity of handling either the bread or the paper used to wrap the same.

Many other objects` and purposes than those stated will appear specifically and in detail as understanding `of the invention is` hadv from the following "description, taken in connection with 'the accompanying drawings and, particularly, the novel method and themechanism which isused, for wrapping each loaf of*bread and turning the projecting ends of the wrapper against the under side of the loaf of bread so that the fweight of a loaf of bread is always acting on and scrvingfto hold the sealed ends ofthe wrapper in place, in addition to the seal` which has been made, by fusing the wax to'hold the wrapper against disengagement fromja loaf of bread. In said drawings,

Fig. l is a side elevation-of the bread.

Wrapping machine of my invention.

Fig. 2 is a fragmentary enlarged longi' tudinal .vertical section through the front end of the machine,

-Fig. 3 is a fragmentary enlarged vertical transverse section through the paper cutting knife used in the machine.

Fig. 4 is a section similar to that shown in Fig. 2 at the `opposite end of the machine.

Fig. 5 is a plan view of the machine, the upper conveying mechanism for the loaves of bread being removed.

Fig. 6 is a horizontal section through the machine at a plane below the plane of movement. of the bread through the machine.

Fig. 7 is a fragmentary enlarged detail wrapping the paper around a loaf of bread. ,g

Fig. 9a is a similar view but with the greater portion of the mechanism illustrated in Fig. 9 removed, showing a succeeding step or operation in the bread wrapping.

l Fig. 10 is a view similar to Fig. 9 showing 4the still further progress of the bread wrapping.

Fig. 11 is a fragmentary vertical longitudinal section similar in many respects to Figs. .9 and l() showing the still further. progress of thebread through the machine, with its complete wrapping. and carrying to the heated sealing plate. t

Fig. 12 is a fragmentary enlarged vertical longitudinal section through a portion of thel through the means used to carry the bread in a progressive series of steps from where it is put on the machine to the lateral conveyor which carries it tothe elevator.

Fig. l is a View similarto Fig. 14, showing a fragment only thereof, and with the parts in another position. i

Fig. 16 is a fragmentary rear elevation of the paper feed and cutting mechanism located at the front end lof the machine.

Fig. 17 is a front elevation of said mechanism.

Fig. 18 is a vertical transverse section through the paper cutter operating mechaa nism.

each time a loaf of bread enters the machine.

Fig. 22 is a horizontal section substantially on the plane of line 22 of Fig. 21 and looking upwardly as indicated by the arrow.

Fig. 23 is a side elevation and vertical- 'ing the elements between which a loaf of bread, with paper over the upperfside, is forced on thel upward movement of the bread elevator.

Fig. 25 isa vertical section substantially on the plane of line 25-25 of Fig. 24.

Fig. 26 is a similar sectionon the plane of line 26-26 of Fig. 24.

Fig. 27 is a vertical section on the plane of line 27 -27 of Fig. 24.

Fig. 28 is a plan view of a detail of the machinev forming a part of the wrapping mechanism for the bread wherein the folded ends are guided and turned inwardly under the loaf.

Fig. 29 isa transverse vertical section therethrough showing the loaf and wrapper in one position.

Fig. 30 is a similar section showing the loaf and wrapper in a different position with the ends of the wrapper turned upwardly and inwardly.

Fig. 31 is al fragmentary rear eleva-tio of the machine at the delivery or rear end thereof showing the mechanism for driving the conveyor in periodic step by step movements.

Fig. 32 is a detail in side elevation of the rack and pinion mechanism forming a part of the drive mechanism for the conveyor.

Fig. 33 is an enlarged fragmentary vertical section taken on' the plane of line :i3-e3 of Fig. 32.

Fig. `34 is a vertical section on the plane of line 34-34 of Fig. 33.

Fig. 35 is a fragmentary enlarged detail of the yielding means used for .stopping the conveyor and holding it in position between steps of its movement, and

Figs. 36 to 40 inclusive are perspective views illustrating the various stages of wrapping a loaf performed by the machine.

Like reference characters refer to like parts in the different figures of the drawings. A

In the construction of the machine, a supporting frame is provided including front end posts 1, rear end posts 2, there being two of each posts at each end of the machine spaced a distance apart and connected at'. their upper ends by horizontal front and rear bars 3 and 4. Adjacent the rear ends` of the bars 3 and 4 a cross bar 5 is secured and a distance from said cross bar 5 a second cross bar 6 is secured, serving to space `the front and rear bars 3 and 4 from each other, as best shown in Fig. 5. In a plane below the upper bars 3 and 4 a series of horizontal bars 7, four in number as shown in Fig. 6, are located and are connected together at their ends by cross bars 8 which, in turn, are connected to the posts 1 and 2. Below the bars 7 another series of b'ars 9 are located in a horizontal plane, paralleling the bars 7. In practice the posts 1 and bars 3, 7 and 9 are made from commercial forms of iron such as angles or the like and the same are securely fastened together to make a rigid framework for supporting the various parts of the mechanism making up the machine.

Two supporting brackets 10 are attached to the front bars 7 and 9 of the machine in spaced apart relation and project forwardly therefrom. They are reinforced and strengthened by a bar-11 disposed horizontally between them in front of and in the same plane with the bars 7. A short distance from the bracket 10 near the front end of the machine a bracket 12 is located, paralleling the upper end of said bracket 10 and being connected to and resting on the barsAv 1l and 7. Two spaced apart boards 13 are located between `the rear bracket 10 and bracket 12, cach at its outer edge, carrying an upwardly projecting guide 14 fo'rmed preferably as the vertical leg of an angle (see Fig. 13). A s ring bar 15 is attached at one end to the ront guide 14 (see Fig. 5) and a similar bar 1G is attached to the part 14 of the rear board 13. Both of the bars 15 and 16 extend inwardly from their respective sides 14, the bar 15 being free inga bracket 19 with at its front end but the bar 16 being adjustable inwardly b'y means of the adjusting screw 17. The loaves of bread are placed Yon boards 13, bridging the space betweenthem and in their movement to the front of the machine are guided by the guides and 16, the guide .15 being yieldable for variations in the lengths-.of the loaves, as is evident.

fn the space a third board l is located, at each end havdepending legs attached thereto. At the lower end of each 1 leg rollers 19a are mounted which are received in horizontal channels 20'connected by a bar 21 (see /Figz 14). These channels are capable of up and down movements but are held against endwise movements by guide pins 22 passing through lugs formed integrally with and extending llaterally from the channels 20. Each of the chani -nels 20 at its lower side hasa projection on which ythe roller 23 is rotatably mounted. Two shafts 25 and 26 extend across from Vthe bar 11 to the front bar 7, being rotatably mountedin suitable bearings carried by' said bars, and 0nY these shafts cams 24 are mounted against which the rollers 23 bear. The cams, as shown in Fig. 14, are shaped so that with the rotation of shafts- 25 and 26 all the channels 20 are simultaneously elevated or depressed thereby raising the board 18 to a plane above the upper sides of the boards 13 or lowering the same below said upper sides of boards 13 so that loaves of bread, indicated at L, are lifted by the board 18 above the boards 13 and are again deposited thereon when the board 18 moves to its lower position:

The shafts 25 and 26 are rotatable in unie son through an endless chain 27 which passes around'sprocket wheels 28 fixed to said shafts. Shaft 25 is driven from a shaft 29 which is rotatably mounted on bearings carried by certain of the horizontal bars 7 of -the machine frame, (see Fig. 6) there being sprocket wheels 3() in alignment on shafts 25 and 29 around which anrendless `chain 31`passes. The shaft 29 at its front end is equipped with a crank arm32 to which one end of a connecting rod V33 is pivotally connected, the opposite end ofthe rod being'pivotally connected 4to a lug 34 depending from the front bracket 19 here-` tofore described. It is evident thatvwith Aeach rotation of the shaft 29, not only are shafts 25 and 26 rotated in a single revolution, but the connecting rod 33 completes a reciprocatory movement and the board F18 is mbved back and forth, the rollers 19a transversing the channel guides 20. Ac-v Acordingly this combined. elevation vand forward movement of the board 18 serves to elevate and carry the loaves of breadl forward, the loaves being deposited on the side etweenthettwo boards 13 e boards 13 when the center board 18 drops below said boards 13; and the mechanism being designed so that the rearward movement of board 18 occurs after it has dropped to its lower position, the loaves of bread are-not carried backward but are carried forward only, moving forward in a series of steps with each forward movement of the board 18 when at its upper position.

An electric motor 35 is supported in any suitabley manner on the lower bars 9 vof the frame. The shaft of this motor is equipped with a pulley 36, driving an endless belt 37 passing around a larger pulley 38 mounted on a shaft 39 which is carried in bearings supported by the bars 7 of the frame of the machine. Shaft 39 is equipped with a gear 40 in mesh with a larger gear 41 which. together with a pinion 42, is fixed on a shaft 43 mounted in bearings carried on one of the bars 7, the pinion 42 being in engagement with a relatively large gear 44 fixed to the shaft 29 heretofore described. By this mechanism it is evident that the shaft 29 is continuously driven from the motor 35 at a reduced speed.

Between the bracket 10 adjacent the front end of the machine, and the bracket 12 spaced a short distance therefrom, a fixture is mounted including vertical sides 45 and a connecting horizontal web 46 (see Figs. 6, 8 and 14). The web 46 is a short distance belowthe upper edges of the side 45 and two plates 47 of sheet metal extend toward each other being shaped apart at their inner edges so as to leave an open slot. Shafts 48 and 49 are mounted'at the outer and inner ends, respectively, vof this fixture between the sides 45 thereof. On each shaft a sprocket wheel 50 is mounted, to carry an endless chain 51 passing around the wheels from which, at two spaced apart points, arms extend of a width that the same may pass freely through the slot between the plates 47 and to which, at their outer ends, plates 52 are connected. The bread being moved along the boards 13 is eventually car inner end 'of the inner side 45 ofthefixtif described, a hollow castingV 55 is secured into which one end of the front shaft 49 passes, being equipped with a beveled ear 56 at its end within said casting. A s aft 57 is mounted in a suitable bearing carried on one of the bars 7 and extends into the 

